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Have you ever walked out in your backyard and heard the faint buzz of a chain saw in the distance, or passed a truck caring a load of logs on the interstate? Chances are that you have considering that wood is most commonly used building material of today's societ ....

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.... but was not very specialized. It would react differently under different conditions. Eventually more complex designs were discovered. These new designs allowed for the precision cutting of hardwood, softwood, with the grain, against the grain, and even raked out the unwanted sawdust. These saws differed in the layout of the teeth. Instead of the jawbone patter the teeth were placed in a "left-right-angled" pattern, to rake the sawdust, and were placed at different distances depending on the substance being cut. As these handsaws progressed and continued to make the job of the wood worker less difficult logger began to take interest in the id ....